Added support for GIFs. Fixes #5

Adding back whitespace

Added back all other tests

Added debug clause for good measure

Added assertions for 4d arrays

Fixed assertion against array width/height

Added data handle for 4d arrays

Aded animated GIF test case

Added frame logic to GIF

Added proper assertion for GIF reader

Fixed up width/height comparison

Added frameless GIF test case

Adding test for GIF
Merge pull request #9 from twolfson/dev/add.gif.support.sqwished

Added support for GIFs. Fixes #5